DCWV White Core vs Core'dinations

The first thing I know about these products is the massive price difference.

In australia a DCWV 12x12 white core stack is $20 for 58 sheets

Core'dinations is generally around $20+ for 20 sheets unless on sale

Core'dinations has a larger product range and colour cores where as DCWV only has the white core with the colour on top.

For me price is a huge selling point for DCWV but is the quality on a par with Core'dinations?

If you have both cardstocks how do you find the different techniques with each? Sanding, embossing, tearing and crumpling?

So far I only have DCWV so am interested in what others think...

I am unsure what these products are, is this a case of quality over quantity?